<div class="col-sm-3 col-md-2 sidebar" id="teacleftsidebar">
    <ul class="nav nav-sidebar">
        <li >
            <a href="#">
                <img src="/static/images/logo.ico" alt="" class="u-headimg-left">
            </a>
        </li>
    </ul>
  <ul class="nav nav-sidebar">
    <li class="active"><a href="#">学生档案</a></li>
    <li><a href="">现场测评</a></li>
    <li><a href="">训练内容</a></li>
    <li><a href="#">...</a></li>
  </ul>
</div>